dashboards-8.x-1.0-beta10/templates/layouts/layouts--1.html.twig

<section {{ attributes.addClass('layouts-dashboards-1', 'layouts-dashboards') }}>
  <div class="drow">
    {% if content.one %}
    <div {{ region_attributes.one }}>
      {{ content.one }}
    </div>
    {% endif %}
    {% if content.two %}
    <div {{ region_attributes.two }}>
      {{ content.two }}
    </div>
    {% endif %}
  </div>
  {% if content.three %}
  <div class="drow">
    <div {{ region_attributes.three }}>
      {{ content.three }}
    </div>
  </div>
  {% endif %}
</section>